Air conditioner



FIG. 1 is a perspective view of the air conditioner;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left-side elevational view thereof;

FIG. 5 is a right-side elevational view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines in the figures show portions of the air conditioner that form no part of the claimed design. 

CLAIM The ornamental design for an air conditioner, as shown and described. 